Cursive script can be divided into broad sense and narrow sense. Broadly speaking, regardless of the times, all scribbled words can be regarded as cursive. In a narrow sense, that is, as a specific font. Formed in the Han Dynasty, it evolved on the basis of official script for the convenience of writing. It is characterized by simple structure and continuous strokes.

Today's grass is also called "a book". The so-called "one book" refers to the connection between words and lines in the creation process of cursive script. Looking at it, it is either connected with pens or broken with pens, so cursive script is also called a book.

Extended data:

The cursive script is divided into Cao Zhang and today's grass, and today's grass is divided into big grass (also called crazy grass) and small grass, which feels beautiful in madness.

Cursive script is further simplified than running script, which is called "a kind of calligraphy". It has the skeleton of regular script, but the structure and shape of the word "delete complex and simplify, change complex strokes and speed tape" have changed greatly. In order to write simply and conveniently and speed up writing, it adopts the following methods:

In the first category, the multi-stroke structure of regular script is simplified to the simplest multi-stroke structure. For example, next to "Yan", you can complete seven strokes of regular script and simplify cursive script into one stroke. Another example is the word "East", with 18 regular script, three cursive scripts, and so on. Therefore, the shape and structure of the characters have completely changed their original appearance because of the grass. Turn symbols with more strokes into symbols with fewer strokes.

The second category is to omit similar strokes that appear repeatedly in regular script, such as "Li" and "Xin".

The third kind, although the strokes of regular script are not reduced, they are combined and deformed to facilitate the movement of strokes. Such as the cursive writing of the word "quit".